System Design · Robinhood · Hard
Suppose you are investigating a drop in the executed_trades per active user metric following a launch. Your goal is to separate the portion of the drop caused by overall market shifts from the portion caused by the product change. Design a difference-in-differences study around the 2025-07-10 release. Let the pre-intervention window be 2025-06-01 through 2025-07-09 and the post-intervention window be 2025-07-10 through 2025-08-21. Choose treatment and control groups (for…
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